/Engine/Plugins/Experimental/ScriptableToolsFramework/Source/ScriptableToolsFramework/Public/ScriptableInteractiveTool.h
OnScriptDrawHUD is called every frame. Use the DrawHUDAPI to draw various simple HUD elements like text. This drawing is not very efficient but is useful for basic Tool visualization/feedback.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintImplementableEvent, Category="ScriptableTool|Events") void OnScriptDrawHUD ( [UScriptableTool_HUDAPI](API\Plugins\ScriptableToolsFramework\UScriptableTool_HUDAPI) * DrawHUDAPI )